In PHP single-threaded applications, it is used to accelerate access to multiple remote calls.
./bin/merge.sh -k start
./bin/merge.sh -k stop
./bin/merge.sh -k restart
http://{your-server-ip}:8080/merge?urls=http://www.a.com/a.json&urls=http://www.b.com/b.json
Depending on the response time of the remote call.